Darkness Crystal exile replacement does not stop Bishop of Wings death triggers.
Playing Pioneer against Selesnya Company.
Cast a Darkness Crystal into Beseech the Mirror to fetch a Day of Judgment and board wipe.
Opponent had two Bishop of Wings and two Resplendent Angels.

Expected:
Opponent's creatures die and are exiled under Darkness Crystal.
Opponent's board is empty of creatures after spells and effects have resolved.

Actual:
Opponent's creatures die and are exiled under Darkness Crystal.
Both Bishop of Wings trigger for the two angels dying and make four spirit tokens.

Notes:
The Bishop of Wings triggers should not go off because the Darkness Crystal is a replacement effect. The angels are being exiled rather than dying. I lost this game from the bug, so a fix would be great.